I'm using Kubuntu 8.10 64 bits, and i can confirm the issue. The fuse mount randomly disconnects when playing a video file with SMPlayer, running in debug mode does not provide any meaningful output. Dismounting and remounting enables the mount again, but hitting play on SMPlayer provokes the disconnection at a random point (which can go from two seconds of hitting play to less than a minute after).
I'm using Kubuntu 8.10 64 bits, and i can confirm the issue. The fuse mount randomly disconnects when playing a video file with SMPlayer, running in debug mode does not provide any meaningful output. Dismounting and remounting enables the mount again, but hitting play on SMPlayer provokes the disconnection at a random point (which can go from two seconds of hitting play to less than a minute after).